Hair straightener



FIG. 1 is a Perspective view of a hair straightener showing my new design, shown in an open position of use;

FIG. 2 is a Front elevational view thereof;

FIG. 3 is a Rear elevational view thereof;

FIG. 4 is a Left side view thereof, shown in a closed position of use;

FIG. 5 is a Right side view thereof;

FIG. 6 is a Top plan view thereof; and,

FIG. 7 is a Bottom plan view thereof. 

CLAIM The ornamental design for a hair straightener, as shown and described. 